Control arrangement for cooling water circulatory systems



Feb. 11, 1964 GQBIEN ETAL V I 3,120,926

CONTROL ARRANGEMENT FOR COOLING WATER CIRCULATORY SYSTEM Filed Oct; 25, 19s:

TO RADIATOR TO ENGINE INVENTORS. ERNST GOBIEN BY JURGEN SIEWERTS A TTORNE YS.

United States Patent 3,120,926 CONTROL ARRANGEMENT FOR COOLING WATER CIR'CULATORY SYSTEMS Ernst Gobien, Berlin, and Jiirgen Siewerts, Berlin-Zeb!- endorf-Sud, Germany, assignors to Daimler-Benz Aktiengesellschaft, Stnttgart-Unterturkheim, Germany Filed Oct. 25, 1961, Ser. No. 147,666

11 Claims. (if/l. 236-345) The present invention relates to an arrangement for controlling the cooling-water circulatory system of internal combustion engines by means of a control and closure member actuated by 'a temperature responsive means, especially by means of a main control slide valve actuated by a regulator of expansible material which controls both the flow quantity of the cooling water into the cooler or radiator as well as also the quantity in the direction back toward the internal combustion engine.

The known prior art constructions of thermostatically actuated control and closure devices which consist of a control slide valve and of a regulator of expansible material whereby the latter includes a Wax cartridge and a closure spring tend toward susceptibility to troubles for different reasons. Since the Wax cartridge can be readily damaged and the control slide valve, as a result of deposits and incrustations of cooling water residues, may become stuck Within the housing, the regulation at times no longer functions in the proper manner. The control slide valve then remains in general in the bypass or short circuit position so that the cooling water can no longer flow into the cooler or radiator whereby, since an inauflicient quantity of cooled water is supplied to the internal combustion engine, an overheating thereof results.

The present invention aims at eliminating the aforementioned disadvantages and shortcomings, and essentially consists in providing a further auxiliary control and closure body member adapted to be manually operated which takes over, in case of sticking on the main control and closure body member, the function thereof.

With an arrangement provided with a temperature feeler or sensing device which actuates the main control and closure body member in such a manner that below a predetermined cooling-water temperature a direct conncction between the cooling water line coming from the internal combustion engine and a bypass or short-circuiting line bypassing the cooler or radiator is established by the main control and closure body member and in which above this predetermined temperature a direct connection between the cooling water line coming from theinternal combustion engine and the cooler or radiator is established by the main control and closure body member, the present invention provides that the auxiliary control and closure body member maybe actuated manually in such a manner that in the one position thereof the same direct connection between the cooling water line coming from the internal combustion engine and the bypass line is established as is by means of the main control and closure body member whereas in the other position of the auxiliary control and closure body member the cooling water line coming from the internal combustion engine is connected by the use of an additional line with the line leading to the radiator.

Additionally, the present invention provides, for an installation with a main control and closure body member constructed as an axially slidable valve, an auxiliary control and closure body member constructed as axial slide valve and arranged coaxially to the main slide valve whereby the discharge aperture into the one line, for example, into the short circuiting line may be valved by both slide valves whereas there is coordinated for the discharge toward the other line one separate discharge 3,120,926 Patented Feb. 11, 1964 aperture to each slide valve whereby the auxiliary slide valve, in case of utilization thereof, can push the main slide valve out of the position in which it closes the common discharge aperture into the other end position thereof.

A further feature according to the present invention of an installation provided with a hollow cylindrical main slide valve into which enters the cooling water and from which the cooling water flows olf, depending on the position of the slide valve, either radially through one discharge aperture or axially through the other discharge aperture controlled in a valve-like manner by the main slide valve, resides in the fact that the auxiliary slide valve also constructed as a hollow cylinder controls in a valve-like manner the common discharge aperture and serves in case of closure of the common discharge aperture by the main slide valve as valve seat for the latter.

Accordingly, it is an object of the present invention to provide a regulating arrangement for the circulatory cooling water system of internal combustion engines which eliminates the shortcomings and inadequacies of the prior art constructions in a simple and effective manner.

It is another object of the present invention to provide a control arrangement for controlling the coolingwater circulatory system of internal combustion engines which not only provides an automatic control but also permits manual actuation of the control device in case of malfunction of the automatic control and therewith assures proper operation of the cooling systems at all times.

A still further object of the present invention resides in the provision of a regulating arrangement for the circulatory cooling water system of internal combustion engines which is simple in construction, reliable in operation, and which may be readily installed into existing systems.

Still another object of the present invention resides in the provision of a regulating installation for the cooling water circulatory system of internal combustion engines which is provided with an automatically operated control slide valve and a manually actuated control slide valve and in which the parts of the control slide valves are so constructed and arranged as to cooperate with each other to produce, in a simple and effective manner, the aforementioned results.

These and other objects, features and advantages will become more obvious from the following description when taken in connection with the accompanying drawing which shows in the single figure thereof, for purposes of illustration only, one embodiment in accordance with the present invention.

Referring now to the single figure of the drawing which shows a cross sectional View through a control arrange ment in accordance with the present invention for the control of the cooling water circulatory system of an internal combustion engine, reference numeral 1 designates therein a housing part which is operatively connected both with the cooler or radiator 2 as well as with a cooling water line 3 coming from the internal combustion engine. The thermostatically actuated control and closure body 4 which is constructed as control slide valve and is provided in the end face 5 thereof with flow apertures 6 is arranged within the housing 1. An auxiliary control and closure body 7, adapted to be manually actuated and also constructed as control slide valve is disposed within housing 1 opposite the main control and closure body 4 and is arranged to be 'displaceable along an imaginary axis 8. The control slide valve 4 is operatively connected with a conventional control member made of expansible material and generally designated by reference numeral 13 which essentially consists of a wax cartridge 9, a closure spring 19, a plunger 11 and a linkage 12. The manually actuated control slide valve 7 which is adapted to be moved axially by means of a spindle 14 and a hand wheel 15, whereby the hand wheel 15 may be secured against any unauthorized and unintentional actuation thereof by means of a seal 16, is provided with a flow aperture 17 arranged coaxially to the spindle 14.

The cooling water coming from the internal combustion engine which flows through the cooling water line 3 at first flows along the expansible material controller 13 and there-upon may flow back into the internal combustion engine through the flow aperture 6 provided in the end face 'of the control slide valve 4 through a bypass channel 18 arranged within housing 1 and a line 19 in bypassing relationship of a radiator (not illustrated) which itself is adapted to be connected by means of a channel 20 within housing 1 and the line 21 to the cooling water line 3. If thecooling water is heated above a predetermined value, then the contents of the wax cartridge 9 expand whereby the plunger 11 and therewith the control slide valve 4 are axially displaced against the effect of the closure spring which is compressed thereby through linkage 12. The control slide valve 4 may be displaced for such a distance that it completely closes the by-pass channel 18 whereby the outer edge 22 of control slide valve 4 rests against the outer edge 23 of the control slide valve 7, forms therewith a sealing valve seat and simultaneously opens the channel leading to the radiator.

In case of failure of the thermostatically-actuated control and closure body 4, the cooling water circulatory system is manually controlled. The spindle 14 and therewith the control slide valve 7, in some cases by forceably moving also the control slide valve 4, is then axially displaced by means of the hand wheel 15. l f the control slide valve 7 is moved up to the abutment 22 of the control slide valve 4, then a by-pass channel 24 disposed within housing 1 is opened so that the strongly heated cooling water which flows through the cooling water line 3 into the interior space of the control slide valve 4, is able to flow througth the fiow aperture 6 of the control slide valve 4 and through the flow aperture 17 of the manually actuated control slide valve 7 as well as through the by-pass channel 24 and the channels 20* and 21 toward the radiator. The control slide valve 7 may be displaced only so far by observation of the permissive cooling water temperature that a partial flow of the cooling water through the radiator and a partial flow through the by-pass channel 18 directly back to the internal combustion engine takes place. In this manner, the correct cooling water temperature corresponding in each case to the prevailing load may be adjustably regulated.

'- While we have shown and described one embodiment in accordance with the present invention, it is understood that the same is not limited thereto but is susceptible of many changes and modifications within the spirit and scope thereof, and we therefore do not wish to be limited to the details shown and described herein, but intend to cover all such changes and modifications as are encompassed by the scope of the appended claims.

We claim:

'1. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a radiator, comprising temperature-responsive control means for selectively controlling the fiow quantity of the cooling water coming from the internal combustion engine either to the radiator or directly back to the internal combustion engine, further means, selectively operable in case of inoperativeness of said firstmentioned control means, to selectively control the flow quantity of the cooling water coming from the internal combustion engine either to the radiator or directly back to the internal combustion engine, said further means comprising further fiow passage means including manually actuated auxiliary control means comprising second valve means.

2. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a first line for conducting the cooling Water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading back to said engine in by-passing relationship to said cooler, comprising main control and closure means for selectively controlling the fiow quantity of the cooling water coming from said first line to said second line and to said third line including main slide valve means and temperature-responsive means for actuating said main slide valve means in dependence on the temperature of said cooling Water in such a manner that below a pre-' determined cooling water temperature a direct communicat-ion is effectively established between said first line and said third line and above said temperature a direct communication is eifectively established between said first line and said second line, a fourth line, and manually actuated auxiliary control and closure means adapted to assume the function of said main control and closure means in case of malfunction thereof and operative to establish in one position thereof efiectively the same direct communication between said first line and said third line as said main control and closure means and in the other a communication between .said first line and said second line through said fourth line.

3. An installation for the control of the cooling water circulatory system of internal combustion engines pro vided with a first line for conducting the cooling water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading [back to said engine in by-passing relationship to said cooler, comprising a fourth line in communication with said second line, means effectively providing a discharge aperture for each of said second, third and fourth lines, main control and closure means for selectively controlling the fiow quantity of the cooling water coming from said first line to said second line and to said third line including an axially movable main slide valve member and temperature-responsive means for actuating said main slide valve member in dependence on the temperature of said cooling water in such a manner that below a predetermined cooling water temperature a direct communication is eifectively established between said first line and said third line and above said temperature a direct communication is elfectively established between said first line and said second line, and manually actuated auxiliary control and closure means including another axially movable slide valve member arranged substantially coaxially to said first-mentioned slide valve member and adapted to assume the function of said main control and closure member in case of malfunction thereof and operative to establish in one position thereof effectively the same direct communication between said first line and said third line as said main control and closure means. and in the other a communication etween said first line and said second line through said fourth line, the discharge aperture leading to one of said second, third and fourth lines being common to both of said slide valve members and being effectively valved by both of said slide valve members while one of the other two discharge apertures of said second, third and fourth lines is operatively associated with only one of said slide valve members and the other of said other two discharge aper tures is operatively associated only with the other of said slide valve members. 4. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a first line for conducting the cooling water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading back to said engine in by-passing relationship to said cooler, comprising a fourth line in communication with said second line, means effectively providing a discharge aperture for each of said second, third and fourth lines,

inain control and closure means for selectively controlling the flow quantity of the cooling water coming from said first line to said second line and to said third line including an axially movable main slide valve member and temperature-responsive means for actuating said main slide valve member in dependence on the temperature of said cooling water in such a manner that below a predetermined cooling water temperature a direct communication is effectively established between said first line and said third line and above said temperature a direct communication is effectively established between said first line and said second line, and manually actuated auxiliary control and closure means including another axially movable slide valve member arranged substan tially coaxially to said first-mentioned slide valve membet and adapted to assume the function of said main control and closure member in case of malfunction thereof and operative to establish in one position thereof offectively the same direct communication between said first line and said third line as said main control and closure means and in the other a communication between said first line and said second line through said fourth line, the discharge aperture leading to said third line being common to both of said slide valve members and being effectively valved by both of said slide valve members while each of the other discharge aperture is operatively associated only with a respective one of said slide valve members,

5. An installation for the control of the cooling water circulatory system of internal combustion engines pro vided with a first line for conducting the cooling water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading back to said engine in by-passing relationship to said cooler, comprising a fourth line in communication with said second line, means effectively providing a discharge aperture for each of said second, third and fourth lines, main control and closure means for selectively controlling the fiow quantity of the cooling water coming from said first line to said second line and to said third line including an axially movable main slide valve member and temperature'responsive means for actuating said main slide valve member in dependence on the temperature of said cooling water in such a manner that below a predetermined cooling water temperature a direct communication is effectively established between said first line and said second line, and manually actuated auxiliary control and closure means, including another axially movable slide valve member arranged substantially coaxially to said first-mentioned slide valve member and adapted to assume the function of said main control and closure member in case of malfunction thereof and operative to establish in one position thereof effectively the same direct communication between said first line and said third line as said main control and closure means and in the other a communication between said first line and said second line through said fourth line, the discharge aperture leading to said third line being common to both of said slide valve members and being effectively valved by both of said slide valve members while each of the other discharge aperture is operatively associated only with a respective one of said slide valve members, and said manually actuated slide valve member being operative to displace, in case of need, said main slide valve member from the position thereof in which it closes the common discharge aperture into the opposite end position thereof.

6. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a first line for conducting the cooling water from the internal combustion engine, a second line directly leading back to the internal combustion engine and a third line leading to a cooler, comprising temperatureresponsive main control, and closure means for selectively controlling the flow quantity of the cooling water coming from said first line either to the cooler through said third line or directly back to the internal combustion engine through said second line including main slide valve means and temperature-responsive means for actuating said main slide valve means, and manually actuated auxiliary control and closure means operative to assume the function of said main control and closure means in case of sticking of the latter.

7. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a first line for conducting the cooling water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading back to said engine in by-passing relationship to said cooler, comprising a founth line in communication with said second line, means effectively providing a discharge aperture for each of said second, third and fourth lines, main control and closure means for selectively controlling the flow quantity of the cooling water coming from said first line to said second line and to said third line including an axially movable main slide valve member of hollow cylindrical construction and temperature-responsive means for actuating said main slide valve member in dependence on the temperature of said cooling water in such a manner that below a predetermined cooling Water temperature la direct communication is effectively established between said first line and said third line and above said temperature a direct communication is effectively established between said first line and said second line, and manually actuated auxiliary control and closure means including another axially movable slide valve member arranged substantially coaxially to said firstmentioned slide valve member and also of hollow cylindrical construction, said second-mentioned slide valve member being adapted to assume the function of said main control and closure member in caseof malfunction thereof and operative to establish in one position thereof effectively the same direct communication between said first line and said third line as said main control and closure means and in the other a communication between said first line and said second line through said iounth line, the discharge aperture leading to said third line being common to both of said slide valve members and being effectively valved by both of said slide valve members while each of the other discharge aperture is operatively associated only with a respective one of said slide valve members, and said manually actuated slide valve member being operative to displace, in case of need, said main slide valve member from the position thereof in which it closes the common discharge aperture into the opposite end position thereof and forming a valve seat for said main slide valve member in the position of the latter in which it closes said common discharge aperture.

8. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a nadiator, comprising temperature-responsive control means for selectively controlling the flow quantity of the cooling water coming from the internal combustion engine to the radiator or directly back to the internal combustion engine including a hollow main slide valve into which enters the cooling water coming from the engine and from which the cooling water leaves, depending on the position of said main slide valve member, either radially through one discharge aperture or axially through another discharge aperture valvingly controlled by said main slide valve member, and manually actu ated auxiliary control means operative to assume the function of said first-mentioned control means in case of inoperativeness of the latter including another hollow slide valve member valvingly controlling also one of the discharge apertures controlled by said main slide valve member, said auxiliary slide valve member serving as valve seat for said main slide valve member in the position of the latter in which it closes the common discharge apenture.

9. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a first line for conducting the cooling Water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading back to said engine in by-paming relationship t i said cooler, comprising la fourth line in communication with said second line, means effectively providing a discharge aperture for each of said second, third and fourth lines, main control and closure means for selectively controlling the flow quantity of the cooling water coming from said first line to said second line and to said third line including an axially movable rnain slide valve member of hollow cylindrical construction and temperature-responsive means for actuating said main slide valve member in dependence on the temperature of said cooling Water in such a manner that below a predetermined cooling water temperature a direct communication is effectively established between said first line and said third line and above said temperature a direct communication is effectively established between said first line and said second line, and manually actuated auxiliary control and closure means including another axially movable slide valve member arranged substantially coaxially to said firstmentioned slide valve member and also of hollow cylindrical construction, said second-mentioned slide valve member being adapted to assume the function of said main control and closure member in case of malfunction thereof and operative to establish in one position thereof effectively the same direct communication between said first line and said third line as said main control and closure means and in the other a communication between said first line and said second line through said fourth line, the discharge aperture leading to one of said second, third and founth lines being common to both of said slide valve members and being effectively valved by both of said slide valve members while one of the other two discharge apertures of said second, third and fourth lines is operatively associated (with only one of said slide valve members and the other of said other two discharge apertures openatively associated only with the other of said slide valve members, and said manually actuated slide valve member being operative to displace, in case of need, said main slide valve member from the position thereof in which it closes the common discharge aperture into the opposite end position thereof, said manually actuated slide valve member forming a valve seat for said main slide valve member in the position of the latter in which it closes said common discharge aperture.

10. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a first line for conducting the cooling water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading back to said engine in by-passing relationship to said cooler, comprising a fourth line in communication with said second line, means efiectively providing a discharge aperture for each of said second, third and fourth lines, main control and closure means for selectively controlling the flow quantity of the cooling water coming from said first line to said second line and to said third line including an axially movable main slide valve member and temperature-responsive means for actuating said main slide valve member in dependence on the temperature of said cooling water in such a manner that below a predetermined cooling water temperature a direct communication is effectively established between said first line and said third line and above said temperature a direct communication is effectively established between said first line and said second line, and manually actuated auxiliary control and closure means including another axially movable slide valve member arranged substantially coaxially to said first-mentioned slide valve member and adapted to assume the function of said main control and closure member in case of malfunction thereof and operative to establish in one position thereof effectively the same direct communication between said first line and said third line as said main control and closure means and in the other a communication between said first line and said second line through said fourth line, the discharge aperture leading to said third line comprising spaced portions of both of said slide valve members and being effectively valved by both of said slide valve members while one of said discharge apertures for said second and fourth lines is controlled by only one of said slide valve members and the other of said last-mentioned apertures is controlled only' by the other of said slide valve members.

11. An installation for the control of the cooling water circulatory system of internal combustion engines provided with a first line for conducting the cooling water from the internal combustion engine, a second line directly leading to a cooler and a third by-pass line leading back to said engine in by-passing relationship to said cooler, comprising a fourth line in communication with said second line, means effectively providing a discharge aperture for each of said second, third and fourth lines, main control and closure means for selectively controlling the How quantity of the cooling water coming from said first line to said second line and to said third line including an axially movable main slide valve member of hollow cylindrical construction and temperature-responsive means for actuating said main slide valve member in dependence on the temperature of said cooling water in such a manner that below a predetermined coolline and above said temperature a direct communication is effectively established between said first line and said second line, and manually actuated auxiliary control and closure means including another axially movable slide valve member arranged substantially coaxially to said first-mentioned slide valve member and also of hollow cylindrical construction, said second-mentioned slide valve member being adapted to assume the function of said main control and closure member in case of malfunction thereof and operative to establish in one position thereof effectively the same direct communication between said first line and said third line as said main control and closure means and in the other a communication between said first line and said second line through said fourth line, the discharge aperture leading to said third line comprising spaced portions of both of said slide valve members and being effectively valved by both of said slide valve members while one of said discharge apertures for said second and fourth lines is controlled only by one of said slide valve members and the other of said last-mentioned apertures is controlled only by the other of said slide valve members, said manually actu ated slide valve member being operative to displace, in case of need, said main slide valve member from the position thereof in which it closes said aperture leading to said third line, into the opposite end position of said main slide valve member, said manually actuated slide valve member further forming a valve seat for said rnain slide valve member in the first-mentioned position of the latter.

References Cited in the file of this patent UNITED STATES PATENTS 2,833,478 Middleton May 6, 1958 

1. AN INSTALLATION FOR THE CONTROL OF THE COOLING WATER CIRCULATORY SYSTEM OF INTERNAL COMBUSTION ENGINES PROVIDED WITH A RADIATOR, COMPRISING TEMPERATURE-RESPONSIVE CONTROL MEANS FOR SELECTIVELY CONTROLLING THE FLOW QUANTITY OF THE COOLING WATER COMING FROM THE INTERNAL COMBUSTION ENGINE EITHER TO THE RADIATOR OR DIRECTLY BACK TO THE INTERNAL COMBUSTION ENGINE, FURTHER MEANS, SELECTIVELY OPERABLE IN CASE OF INOPERATIVENESS OF SAID FIRSTMENTIONED CONTROL MEANS, TO SELECTIVELY CONTROL THE FLOW QUANTITY OF THE COOLING WATER COMING FROM THE INTERNAL COMBUSTION ENGINE EITHER TO THE RADIATOR OR DIRECTLY BACK TO THE INTERNAL COMBUSTION ENGINE, SAID FURTHER MEANS COMPRISING FURTHER FLOW PASSAGE MEANS INCLUDING MANUALLY ACTUATED AUXILIARY CONTROL MEANS COMPRISING SECOND VALVE MEANS. 